| point of convergence(expression, idiom, core, nub, pivot) | |
| quintessence(noun, emotion, heart, soul, mood) | |
| radiant | |
| radius | |
| rally(noun, focus) | |
| rendezvous(noun, focus) | |
| rowlock | |
| smokehole | |
| spokes | |
| stone(noun, nut, seed, grain) | |
| tangent | |
| target(noun, core, nub) | |
| trunnion | |
| umbilicus | |
| wheel's center | |
| wheel's central part(expression, idiom) | |
| wheel's centre | |
| approach | |
| areola | |
| cincture |
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| APA | Smart Define. (2015). hub thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/hub/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "hub thesaurus" https://smartdefine.org/hub/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, hub thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/hub/thesaurus/synonyms>. |
| MLA | Smart Define. "hub thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/hub/thesaurus/synonyms> |